Door-closing mechanism.



C. FORTH.

DOOR CLOSING MECHANISM.

APPLICATION FILED AUG-4, 191s.

In ven tor: 6 07% Patented May 8, 1917.

CHARLES FORTH,

or orrawa, .onranro, CANADA.

DOOR-CLOSING. MECHANISM.

Specification of Letters Patent.

Patented 8, 1917.

Application filed August 1, 1916. Serial No. 113,100.

To all whom it may concern:

Be it known that 1, CHARLES Fon'rrr, a citizen of the United States,esiding at Ottawa, in the Province of Ontario, Dominion of Canada, haveinvented certain new and useful Improvements in Door-Closingiwlechanisms, of which the following is aspecii'ication, reference beinghad therein to the accompanying drawing.

This invention relates to loor closing mechanism, and has reference moreparticularly to that type comprising a closing motor or spring, usuallyattached to the door, an actuating arm operated by the motor, and alinlrpivoted to the arm and usually connected with the door framing, theobject of the invention being to provide for holding he door open indifferent positions against the closing action of the motor.

ll ith this object in vie v, my invention consists in combining with thepivotally connected actuating arm and link of a door closing mechanism,a locking device of im iroved form and construction applied to saidparts adjacent the point of pivotal connection and operable to hold thearm and link yieldingly against relative pivotal motion in differentopen positions of the door, a manually operable releasing device beingprovided for rendering the locking device inactive in order that thedoor closing mechanism may operate in its normal manner in effecting theclosing action of the door.

In the accompanying drawings:

Figure 1 is a top plan view of a door closing mechanism having myinvention embodied therein, the releasable locking device being shown inactive position.

Fig. 2 is a side elevation of the same with certain parts broken away. a

Fig. 3 is a top plan view on an enlarged scale of the connected ends ofthe arm and link, showing the locking device out of action.

Fig. i is a vertical sectional elevation on an enlarged scale on theline aa of Fig. 1.

Referring to the drawings:

1 indicates a barrel or casing adapted to be connected with a door andprovided with a motor usually in the form of a closing spring (notshown), which acts to rotate a shaft or stud 2 mount-ed in the casingand connected at its outer end with one end. of an actuating arm 3. 4indicates a link, the outer end of which is adapted to be jointed to thedoor framing 5 and the inner end of which is pivotally connected withthe free end of the actuating arm, by means of a pivot pin 6 extendingthrough th adjacent ends of the arm and link.

In applying my invention to a door closing mechanism of this type, thereis arranged between the ends of the arm and link a toothed member in theform of a disk 7 containing a central opening through which the pivotpin passes and firmly fixed to the link, in the present instance bymeans of fastening pins 8 extending through the disk and'into the linkso that the disk will be moved with the link. The disk is provided onits edge with pointed teeth 7 between which is adapted to engage alocking tooth 9 on the end of a locking bolt 10 carried by the actuatingarm3 and constituting a locking device. This bolt extends longitudinallyof the arm and is mounted to slide endwise in guiding openings in lugs11 extending upwardly from the arm, a compression spring 12 encirclingthe bolt and bearing at one end against a shoulder 10 thereon and at itsopposite end against the end guiding lug 11, the tendency of the springbeing to urge the locking bolt toward the toothed member and hold thelocking tooth yieldingly between adjacent teeth on the toothed member,as shown in Fig. 1. With the parts in this position, the locking boltwill act to hold the arm and link yieldingly against pivotal relativemovement so that the door may be held in difierent open positionsagainst the closing action of the motor. Due to the fact that thelocking bolt is yieldingly held in engagement with the toothed disk, ifthe door when held open is forcibly pushed in either direction, thelocking bolt will yield and the arm and link will be permitted to pivoton each other without injury to the parts. As a result of this action,the door may be moved in either direction and held as desired.

Means are provided for rendering the locking device inactive when it isdesired that the closing motor will act normally in closing the doorfrom an open position, which means in the present instance consists of areleasing device in the form of a manually operable cam 13 which ismounted between the toothed disk and actuating arm and is provided withan opening through which the pivot pin 6 extends, the cam being thusrotatable about the axis of the pin and being provided with a handle 14for operating it. The active edge of the cam is in position to engagethe end of the looking tooth 9 on the locking bolt, and is curvedeccentrically with respect to the axis oi": rotation, thereby forming ahigh portion 15 and a low portion 16, a stop lug 17 being provided atthe end of the high portion, and a stop lug 18 being provided at the endof the low portion. When the cam is in the position shown in Fig. 1, thelow portion thereof will be in line with the locking tooth and thelatter will be held by the spring 12 between adjacent teeth on thetoothed disk, thereby rendering the locking device active to hold thedoor in open position. F/hen,

' however, the cam is rotated to the position shown in Fig. 3 the highportion or" the cam will be engaged with the locking tooth and thelocking bolt will be forced endwise against the action of the spring,which will disengage the locking tooth from the toothed disk and thelocking device will be held inactive, so that the closing mechanism willbe permitted to act in its normal manner in closing the door.

The construction described is of extreme simplicity, effective inoperation, and the releasing device is in position to be convenientlyoperated either to render the locking device active or inactive at will,it being but necessary when the door is to be held open in a givenposition to reach up and turn the handle 1% from the position shown inFig. 3 to the position shown in Fig. 1, and when the locking device isto be rendered inactive, to permit the door closing mechanism to operatenormally, to turn the handle in the reverse direction to its formerposition indicated in Fig. 3.

In the foregoing description and accompanying drawings, I have shown myinvention in the particular detailed form and arrangement or the partswhich I prefer to adopt and which I have found in practice to answer toa satisfactory degree the ends to be attained. It will be manifest,however, that these details may be variously changed and modified withinthe limits of my invention provided the operation will be substantiallyas described; and it will be understood that the invention is notlimited to any particula form or construction of the parts except in sofar as such limitations are specified in the claims.

Having thus described .my invention, what I claim is:

1. In a door closing mechanism, the combination of a closing motor, anarm actuated thereby, a link pivoted to the arm, a toothed membercarried by one of said parts adjacent the pivot, a yielding lockingmember carried by and movable relatively to the other part and adaptedto engage the toothed member and hold the link and arm yieldinglyagainst relative pivotal movement, and a manually operable releasingdevice sustained in position to act on the locking member, saidreleasing device being oper able at will to disengage the locking menher from the toothed member and hold the same disengaged.

2. In a door closing mechanism, the combination of closing motor, an armactuated thereby, a link pivoted to th arm, a toothed member carried bythe link adjacent the pivot, a yielding locking member nounted on thearm and adapted to engage the toothed member and hold the partsyieldingly against relative movement, and a manually operable releasingdevice sustained in position to act on the locking member, saidreleasing device being operable at will to disengage the locking memherfrom the toothed member and hold the same disengaged.

3. in a door closing mechanism, the combination of a closing motor, anarm actuated thereby, a link, a pivot pin connecting the a m and linkpivotally together, a toothed member surrounding the pin between the armand link and movable with the link, a springpressed locking bolt mountedon the arm in position to engage the toothed member and hold the arm andlink yieldingly against relative pivotal movement, and a manuallyoperable releasing cam sustained in position to act on the locking boltand disengage it from the toothed member.

a. In a door closing mechanism, the combination of a closing motor, anarm actuated thereby, a link, a pivot pin connecting the arm and linkpivotally together, a toothed disk surrounding the pin between the armand link and connected with the link, a spring-pressed locking boltmounted on the arm and provided on its end with a locking tooth inposition to engage between the teeth on the disk, and acting when soengaged to hold the arm and link yieldingly against relative pivotalmovement, and a manually operable releasing cam rotatable on the pivotpin between the toothed disk and arm in position to act on the lockingtooth and disengage the same from the toothed disk.

In testimony whereof, I have aiiiXed my signature in presence of twowitnesses.

CHARLES FORTH. Witnesses:

O. GAYLoRD MARSH, W. W. SCOTT, Jr.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

